package com.itheima.edu.info.manager.controller;

import com.itheima.edu.info.manager.domain.Student;
import com.itheima.edu.info.manager.service.StudentService;

import java.util.Scanner;

public abstract class BaseStudentController {
    private StudentService studentService = new StudentService();
    private Scanner sc = new Scanner(System.in);

    // 开启学生管理系统，并展示学生管理系统菜单
    public final void start() {
        studentLoop:
        while (true) {
            System.out.println("--------欢迎来到 <学生> 管理系统--------");
            System.out.println("请输入您的选项：1. 添加学生  2.删除学生  3.修改学生  4.查看学生  5.退出");
            String choice = sc.next();
            switch (choice) {
                case "1":
//                    System.out.println("添加");
                    addStudent();
                    break;
                case "2":
//                    System.out.println("删除");
                    deleteStudentById();
                    break;
                case "3":
//                    System.out.println("修改");
                    updateStudent();
                    break;
                case "4":
//                    System.out.println("查询");
                    findAllStudent();
                    break;
                case "5":
                    System.out.println("感谢您使用学生管理系统，再见！");
                    break studentLoop;
                default:
                    System.out.printf("您的输入有误，请重新输入");
                    break;
            }
        }
    }

    public final void updateStudent() {
        String updateId = inputStudentId();
        Student stu = inputStudentInfo(updateId);
        /*boolean result = studentService.updateStudent(stu);
        if (result) {
            System.out.println("修改成功");
        } else {
            System.out.println("修改失败");
        }*/
        studentService.updateStudent(updateId, stu);
        System.out.println("修改成功");
    }

    public final void deleteStudentById() {
        String delId = inputStudentId();
        // 3. 调用 StudentService 中的 deleteStudentById 根据 id 删除学生
        studentService.deleteStudentById(delId);
        // 4. 提示删除成功
        System.out.println("删除成功");
    }

    public final void findAllStudent() {
        Student[] stus = studentService.findAllStudent();
        if (stus == null) {
            System.out.println("查无信息，请添加后重试");
            return;
        }
        System.out.println("学号\t\t\t姓名\t年龄\t\t生日");
        for (int i = 0; i < stus.length; i++) {
            Student stu = stus[i];
            if (stu != null) {
                System.out.println(stu.getId() + "\t" + stu.getName() + "\t" +
                        stu.getAge() + "\t\t" + stu.getBirthday());
            }
        }
    }

    public final void addStudent() {
        // 1. 键盘接收学生信息
        Scanner sc = new Scanner(System.in);
        String id;
        while (true) {
            System.out.println("请输入学生 ID：");
            id = sc.next();
            boolean flag = studentService.isExists(id);
            if (flag) {
                System.out.println("学号已被占用，请重新输入：");
            } else {
                break;
            }
        }

        Student stu = inputStudentInfo(id);
        // 3. 将学生对象，传递给 StudentService 中的方法

        boolean result = studentService.addStudent(stu);
        // 4. 根据返回的 boolean 类型结果，在控制台打印成功/失败
        if (result) {
            System.out.println("添加成功");
        } else {
            System.out.println("添加失败");
        }
    }

    // 键盘录入学生 id
    public String inputStudentId() {
        String id;
        while (true) {
            System.out.println("请输入学生 id：");
            id = sc.next();
            boolean exists = studentService.isExists(id);
            if (!exists) {
                System.out.println("您输入的 id 不存在，请重新输入");
            } else {
                break;
            }
        }
        return id;
    }

    // 键盘录入学生信息
    public abstract Student inputStudentInfo(String id);
}
